Aider vs OpenCode (2026)
Updated April 29, 2026
Overview
Aider is an open-source terminal-based AI pair programming tool that edits code directly in your local git repository. It creates proper git commits, supports all major LLMs, and can work across multiple files simultaneously. Aider is popular with developers who prefer terminal workflows over IDE extensions.
OpenCode is an open-source AI coding agent for the terminal, IDE, and desktop with 75+ LLM providers. Compare its Zen and Go pricing, pros, and cons.
Key features
Core capabilities each platform advertises.
- Terminal UI, desktop app, and IDE extensions
- 75+ LLM providers via Models.dev, including local models
- Sign in with GitHub Copilot or ChatGPT Plus/Pro
- LSP-enabled code understanding
- Multi-session agents on the same project
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- Free installation with pay-per-use model (USD 0.01-0.10 per feature)
- Exceptional Git integration with automatic commits and undo
- Multi-file project handling with intelligent change detection
- Diff-based changes provide full transparency and control
Cons
- Requires local setup and Git knowledge
- No tight IDE integration—terminal-focused
- Occasional prompt refinement needed for optimal results
- Lacks automated compliance features for enterprise legal teams
Pros
- Free and open source under MIT
- Doesn't store code or context data
- 75+ providers, including local models and existing Copilot or ChatGPT subscriptions
- Same agent across terminal, desktop, and five IDEs
Cons
- Zen data retention varies by provider, and OpenAI keeps requests for 30 days
- Zen credit purchases carry card fees of 4.4% + $0.30
- Go plans cap usage in 5-hour, weekly, and monthly windows
What people are saying
It was the first time I felt like I could write up a large prompt, walk away from my laptop, and come back to a lot of work having been done.
Read full reviewAider or OpenCode — which should you choose?
Choose Aider if you wantChoose if you want
Choose OpenCode if you wantChoose if you want
- Terminal-first AI pair programming
- Privacy-sensitive environments using local models
- Parallel agent sessions on one codebase
- BYOK across providers without switching tools
Compare Aider and OpenCode on your own traffic
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.
Try Respan free